A 7 year old boy kills zoo animals

A 7 year old boy was caught on the security surveillance camera at a zoo in Australia killing the zoo animals. They caught the boy but he can’t be charged because of his age. I think that law should be changed. A 7 year old certainly knows right from wrong. I also wonder what were his parents doing at the time to allow him to take off and enter the zoo and kill the animals. It wonder if Australia has any child neglect laws because they were obviously not keeping an eye on him. The news release is below.